title: (1R,2S,4S,4aS,8S,8aS)-4-Hy-droxy-8,8a-dimethyl-10-oxo-2,3,4,7,8,8a-hexa-hydro-1H-4a,1-(ep-oxy-methano)-naphthalen-2-yl acetate.
abstract: The title compound, C15H20O5, presents a bis-norsesquiterpene skeleton, with a trans-deca-line backbone constrained by the lactone bridge. The α-hy-droxy substituent and the methyl group belonging to the two deca-line rings are in axial positions, whereas the other methyl group and the acyl group occupy the sterically preferred equatorial positions. The mol-ecular structure is stabilized by an intra-molecular C-H⋯O hydrogen bond. In the crystal, mol-ecules are linked into chains along [010] by O-H⋯O hydrogen bonds.
authors.affiliation: Laboratoire de Synthèse Organique Modélisation et Optimisation des Procédés Chimiques, Université Badji-Mokhtar Annaba, BP12, 23000 Annaba, Algeria ; Université de Nantes, CNRS, Laboratoire CEISAM-UMR 6230, Faculté des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
authors.forename: Ouassila
authors.initials: O
authors.lastname: Selaïmia-Ferdjani
authors.forename: Chahra
authors.initials: C
authors.lastname: Bidjou-Haiour
authors.forename: Aurelien
authors.initials: A
authors.lastname: Planchat
authors.forename: Muriel
authors.initials: M
authors.lastname: Pipelier